1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1260ad857ac86191ddf7204c73dc6d1422474e73434a515aa16568116886d3b1. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e22983b-425b-4677-8339-e143ec7d6cfe.json and https://artists.proofprofile.net/proofs/artist/3e22983b-425b-4677-8339-e143ec7d6cfe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa223292bbacdc99f392aee5870bc7761e6cd6b55c1833a1aeabde9728412b270. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20107871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7673da1a8e02abc263d041587e061c3a48034b922f23c227c77e30618caa38. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20107873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f8c23ce34bd1fbbad53399722b671f4c890effb580b158adab6d8bf4593f75. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20107874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf465e9933dfc98366bf3c30f8aaa113b348a2e46b327013d623e441b3085ab00. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20107875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79e1ddd532271d75681b319c75e58107651ca1e07ae43381b74fdb7039052e3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20107397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42ff60dd06f08a574c5fdcf169e21b726117c8df18c9824c88bd287871a0d72. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20107398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6309fd7840a4a0a15a5b2f2b60a2af02c1eb979940205e015b8fd0105d555c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20107399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79e1ddd532271d75681b319c75e58107651ca1e07ae43381b74fdb7039052e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20107397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d47c15f98d61ed5e13fe14681301ca74c1247e6c3023e0a96bf54e0321ce0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20107396.
Sometimes I Feel Like a Motherless Child
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e5816e35cc9e32e79c027efc0dfaf0f975a75e00516f96fd168d462898d56a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSJ19900291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d76a10b3ca56ebdd86080784af3c22dd2189ec1e963098fcab629406abd169d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20104040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b5d32a3b4c15007c5e0f4540bdcdf02bdef6ec2a0adedeac7549f2978813a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20104038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d76a10b3ca56ebdd86080784af3c22dd2189ec1e963098fcab629406abd169d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20104040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cca861c5bfeb93a7caebbec068adfe5074b23fd67898b3ced4630cf940e135. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20104042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e632075a1e2c8f1eaf61315750cbeff80c2c5b5ea79bbbceb8c7ce41f365c0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20104039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884e813a8c57e05969f8fb851b02494d7e552c9fe80708e5dc62d744b6e19e91. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20104035.